An Australian coal wash plant for ROM (run of mine) coal screening, was being driven by roller chains running in an oil bath.

However, the existing roller chain drives were stretching, breaking and needed to be heavily greased. There were 39 chains that required replacement in one year on the screen creating significant costs in maintenance and downtime.

Poly Chain GT Carbon belts require no lubrication, a key advantage over the most problematic aspect of a roller chain drive.

When first installed, the Poly Chain GT Carbon belts were running in the oil bath without any issues and without compromising their performance.

In addition, once a belt drive is installed and properly tensioned and aligned, it never needs re-tensioning. Roller chain, no matter how well maintained and lubricated, eventually elongates, requiring periodic take-up and re-tensioning. A synchronous belt drive system is essentially maintenance-free.

The drives on the roller screen have run for 24 months without requiring any maintenance.

The benefit of replacing the chain drive with the Poly Chain GT Carbon belts has been the significant reduction in maintenance costs due to eliminated need for regular chain replacement.

The success of the conversion has resulted in the screen manufacturer making Poly Chain GT Carbon the original equipment design, to optimise the screening process.

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